Comtech EF Data CDM-600/600L - Manual (Page 210)

CDM-600/600L Open Network Satellite Modem Revision 3
Appendix D MN/CDM600L.IOM
D–18
Parameter
Type
Command
(Instruction
Code and
Qualifier)
Arguments for
Command or
Response to
Query
Description of Arguments
Response to
Command
Query
(Instruction
Code and
Qualifier)
Response to Query
Rx
Descrambler RDS= 1 byte, value of
0 or 1 Command or Query.
Rx Descrambler state, where:
0=Off
1=On
2=IESS-315 when in Turbo mode
2=Special when uncoded or Viterbi (needs FAST Special Option 1
installed)
Example: RDS=1 (Scrambler On)
RDS=
RDS?
RDS*
RDS# RDS? RDS=x
(see Description of
Arguments)
External
Clock REF= 10 bytes Command or Query.
x=External Baseband Clock between 2.4 kHz and 20 MHz.
y=U for Unbalanced, B for Balanced.
Example: REF=10000.000U (Selects 10MHz, Unbalanced)
REF=
REF?
REF*
REF# REF? REF=xxxxx.xxxy
(see Description of
Arguments)
Rx ESC Type RET= 1 byte, value of
0 or 1 Command or Query.
(IDR Parameter)
Sets or queries IDR Rx ESC Type, where:
0=64k data channel
1=2 Audio channels RET=
RET?
RET*
RET# RET? RET=x
(see Description of
Arguments)
Rx Frequency RFQ= 9 bytes Command or Query.
Rx Frequency, 950 to 1950 MHz
Resolution=100 Hz
Example: RFQ=0950.9872 RFQ=
RFQ?
RFQ*
RFQ# RFQ? RFQ=xxxx.xxxx
(see Description of
Arguments)
Rx IF
Impedance
(CDM-600 ONLY) RIP= 1 byte, value of
5 or 7
Command or Query.
Rx IF Impedance, where:
5=50
Ω
7=75 Ω
Both Tx and Rx sides will change with this selection.
Example: RIP=5 (50
Ω)
RIP=
RIP?
RIP*
RIP# RIP? RIP=x
(see Description of
Arguments)
RX LO
Frequency
(CDM-600L ONLY)
RLO= 6 bytes Command or Query.
LNB receive LO frequency information in the form xxxxxs, where:
xxxxx is the LO frequency, in the range of 3000 to 65000 MHz
or 0 (OFF)
s is the sign for the MIX
Note: For additional information refer to Appendix F. BUC FSK
COMMUNICATION; LO, MIX , and Spectrum Settings.
Note: Terminal Frequency = LNB LO
± RFQ
RLO=
RLO?
RLO*
RLO# RLO? RLO=xxxxxs
(see Description of
Arguments)
Rx Reed-
Solomon
Decoding RRS= 1 byte, value of
0 to 3 Command or Query.
Rx Reed-Solomon decoding, where:
0=Normal (based on the Open Network framing mode selected)
1=IESS-310 mode – Available all framing modes, except EDMAC.
2=EF Data legacy standard (225,205) – Unframed only
3=IBS (126,112) – Unframed only
Note: Available in all framing modes, except EDMAC (This is a ‘don’t
care’ if no RS is selected in FEC type)
Example: RRS=0 (selects Normal) RRS=
RRS?
RRS*
RRS# RRS? RRS=x
(see Description of
Arguments)